FOREWORD

This manual has been prepared to assist the service

engineer in making any adjustments and repairs that may

be necessary on 1939 Seeburg Symphonolas.

In preparing this manual every effort was made to

present the material in as simple a form as possible.

Wherever practical, the steps in a particular operation.

are set forth in numbered paragraphs.

Seeburg maintains a nation-wide organization of

field engineers to instruct and cooperate with your service

department. You will find these men up to date on

all information pertaining to service. In addition, we

maintain a home service department at the factory to

help you and to furnish you with any technical or service

information that you may desire.

When requesting information by wire or letter

relative to the Symphonola, please give Model and Serial

Number. Also please give a full description of the

problem at hand so that we may be better able to serve

you.

TABLE OF CONTENTS

TO PREPARE INSTRUMENT FOR OPERATION	5

OPERATION & MAINTENANCE	6

MOTOR	6

MOTOR FUSE BLOWS	7

MECHANISM FAILS TO RESPOND WHEN COIN IS INSERTED	7

MAGAZINE RELAY DOES NOT RESPOND TO COIN	8

TURNTABLE FAILS TO RISE TO PLAYING POSITION	8

TOO FEW PLAYS FOR THE AMOUNT OF COINS INSERTED	9

TOO MANY PLAYS FOR THE AMOUNT OF COINS INSERTED	9

NEEDLE DOES NOT ENTER RECORD GROOVE PROPERLY	10

CHANGING MECHANISM MOT SET IN OPERATION AT END OF RECORD PLAY
11

TURNTABLE DOES NOT ROTATE WHEN IN PLAYING POSITION	11

RECORD COMING UP TO PLAYING POSITION AND RETURNING WITHOUT PLAYING	12

TONE ARM WEIGHT ADJUSTMENTS	12

CONTINUES TO REPEAT SAME SELECTION	12

SELECTOR PULLING OUT TWO OR MORE TRAYS AT ONE TIME	13

RECORD TRAYS CANNOT BE RETURNED TO THEIR NORMAL POSITION AFTER
CHANGING RECORDS	15

SOUND EQUIPMENT	15

SOUND EQUIPMENT APPARENTLY "DEAD"	16

FAULTY TONE QUALITY	16

Coin Switch Assembly

Instructions for Installation of Extra Speaker and

Volume Control Unit

Junction Terminal Box

L I g h t F use B 1 ow s

Record Playing Indicator Dial

Symphonola Chassis, Plate No. 1

Symphonola Chassis, Plate No. 2

Symphonola Chassis, Plate No. 3

Symphonola Chassis, Plate Ho. 4

Coin Switch Assembly, Plate No. 5

Symphonola Cabinet Wiring - Model Mayfair

115 Volt, 60 Cycle.

Symphonola Cabinet Wiring - Model Mayfair

115 Volt, D.C.

Symphonola Cabinet Wiring - Model Mayfair

32 Volt, D.C.

Symphonola Cabinet Wiring - Model Plaza

115 Volt, 60 Cycle.

Symphonola Cabinet Wiring - Model Plaza

115 Volt, D.C.

Symphonola Cabinet Wiring - Model Plaza

32 Volt, D.C.

Symphonola Cabinet Wiring - Model Casino

115 Volt, 60 Cycle.

Symphonola Cabinet Wiring - Model Casino

115 Volt, D.C.

Symphonola Cabinet Wiring - Model Casino

32 Volt, D.C.

Symphonola Cabinet Wiring - Model Classic

115 Volt, 60 Cycle.

Symphonola Cabinet Wiring - Model Classic

115 Volt, D.C.

Symphonola Cabinet Wiring - Model Classic

32 Volt, D.C.

Symphonola Cabinet Wiring - Model Vogue

115 Volt, 60 Cycle.

Symphonola Cabinet Wiring - Model Vogue

115 Volt, D.C.

Symphonola Cabinet Wiring - Model Vogue

32 Volt, D.C.

Amplifier Wiring Diagram Used in Symphonola - Model

Mayfair, Type 820C-2

Amplifier Wiring Diagram Used in Symphonola - Model

Mayfair, Type 830-I-Z

Amplifier Wiring Diagram Used in Symphonola - Model

Plaza, Type 720C-2

Amplifier Wiring Diagram Used in Symphonola - Model

Plaza, Type 725-I-C

Amplifier Wiring Diagram Used in Symphonola - Model

Casino, Type 625-I-Z

Amplifier Wiring Diagram Used in Symphonola - Model

Casino, Type 725-I-C

TO PREPARE INSTRUMENT FOR OPERATION

UNPACKING: We advise that the packing case be carefully examined

before unboxing instrument, and should there be any indication of

concealed damages, the transportation company should be notified.

(1)	Remove the screws holding the front of the packing case, to the sides.

(2)	Carefully remove instrument from packing box.

(3)	Open doors in back by means of the keys which are wrapped and fastened to the coin slot.

(4)	Remove the fastening from tone arm to tone arm post bracket.

(5)	Remove shipping block holding record trays, and shipping brace and wooden block which hold the motor rigidly for transportation purposes. It is advisable to keep these braces in the bottom of the instrument and use them again when transporting the machine.

(6)	Remove four wing nuts in each corner of the chassis.

NOTE: Wing nuts should be removed so that the chassis may be resiliently suspended in the spring mounting. This is absolutely essential in order that the best tone quality may be obtained. When instrument is again to be moved, these wing nuts should be replaced and tightened down so that they hold the chassis rigidly.

NEEDLE: The Symphonola Pickup is designed to use any standard

phonograph needle, however, we recommend the type supplied with

the instrument. The needle should be installed having the flat

part of the needle aligned parallel to the grooves in the record.

CURRENT SUPPLY FOR INSTRUMENT: On the back of each instrument

will be found a name plate which gives the type of current upon

which the instrument is designed to operate. If in doubt as to

whether or not the type of current at the location is correct,

look at the house watt hour meter or call the local power company

for this information.

INSTRUCTIONS FOR INSTALLING RECORDS: A set of record support

discs will be found fastened inside of cabinet. One disc should

be used as a support underneath each record. It is not necessary

to remove the record support discs from the trays when records

are being changed, but it is important to make certain that both

the discs and records are centered properly in the record trays.

When installing or replacing the records in the instrument,

it is best to install or replace the record in No. 20 tray first.

Install or change balance of records starting with No. 1 tray and

work down thru stack of record trays until all the records are in

their respective trays. As each record is put in its tray the

title for that particular record should be put in its proper

place in the program holder.

After all trays have been filled they must be returned to

their original position by hand excepting No. 20 which should

remain over turntable.

OPERATION & MAINTENANCE

APPEARANCE: It is important that the general upkeep and appearance of the instrument be maintained. A careful selection of good quality records that fit in with the location should be

made. Typewritten or printed title slips should be used at all

times. This not only adds to the attractiveness of the instrument, but increases its earnings.

LUBRICATION: Oil the gears occasionally using an automobile

oil having a viscosity of 20. Oil all friction points,

such as the high speed transmission bearings and selector feed

clutch plates on toothed rack. We recommend this oil inasmuch

as the ordinary light sewing machine oil on the turntable shaft

or transmission shaft or transmission bearings has not enough

body to retain proper lubrication. The slide grooves may be

oiled sparingly should the record carriers become binding or

sticky. If grease has been used in the slide grooves or 5rooves1

b..come gritty or 5urruny, the record carriers may bind. Same

should be washed thoroughly with a brush and a light grade of

good quality lubricating oil. Wipe clean and re-oil sparingly.

DO NOT USE VASELINE OR ANY GREASE IN THE SLIDE GROOVES AS

IT WILL QUICKLY GUM UP CAUSING A HEAVY LOAD ON THE SELECTOR

SLIDE PLATE.

MOTOR

The motor used to drive the mechanism is a 1/30 H.P. induction type with a starting winding and a starting winding

switch. The starting winding switch automatically turns off

the current to the starting windings when the motor has

attained the proper speed.

(1)	Motor does not start: Blown or defective motor fuse. Check motor fuse in Junction box. Make sure contacts in play magazine are closed and are making proper contact. A bind in mechanism may cause too heavy a load on motor and will not allow it to turn.

(2)	Motor does not start until coupling is disconnected and motor is spun with fingers: Cause of trouble in this case may be a defective starting winding switch or a burned out starting winding. By removing the end plate of the motor the starting winding switch is made accessible and can be cleaned with fine sand paper, then wiped with a clean cloth.

(3)	Starting winding cuts in and out continuously: This is usually due to a bind in the chassis mechanism which allows the motor to just barely come up to enough speed to open the starting winding switch - the motor speed is then immediately reduced due to the heavy drag causing the starting switch to close again.

(4)	Motor Base. No. 1840, Fig. 2: The motor is resiliently mounted on steel springs in order to prevent vibration from the motor being transmitted through the chassis and reaching the pickup.

(5)	Note: It is important that the two sides of the loop in the spring No. 1841, Fig. 2, mounting do not touch each other where they cross. If they do vibration will be transmitted into the chassis and interfere with the true reproduction of music.

MOTOR FUSE BLOWS

(1)	Replace with a 3 ampere fuse but before replacing, find what caused fuse to blow. There are a number of reasons that will cause the motor fuse to blow. The most usual reason is the failure to remove all shipping blocks.

Make Sure Instrument is Completely Unblocked:

(2)	Bind in transmission gears No. 3054 and No. 1071, Fig. 1, causing overload on motor. Tight bearings in motor. This can be determined by loosening coupling No. 1083, Fig. 1 and turning motor with fingers. It should turn freely.

(3)	Record trays may be jammed due to dirt or grit in the tray grooves. Neither Vaseline nor grease should ever be used to lubricate the tray grooves as binding of the trays is almost certain to be the result. If grease has been used in the grooves, they can be cleaned by applying with a brush, a light grade of good quality lubricating oil.

(4)	If instrument has been in a cold place over night, it should be allowed to warm up before the current is turned on, otherwise the lubrication will be stiff causing a heavy drag on the motor which will often blow the fuse.

MECHANISM FAILS TO RESPOND WHEN COIN IS INSERTED

Corrective measures will be found under the following

headings:

Page No. 7	Motor Fuse Blows

Page No. 6	Motor

Page No. 8	Magazine Relay Does Not Respond To Coin

Page No. 8, 10	Turntable Fails to Rise to Playing Position

Page No. 9	Coin Switch Assembly

MAGAZINE RELAY DOES NOT RESPOND TO COIN

(I} Look for loose line cord connection at wall outlet.

(2) Make sure that Service Relay lamp in Junction Terminal Box

is not burning. The play magazine is inoperative when

service relay light is on.

(3) Service relay lamp may be loose in its socket or may be

burned out. If lamp is burned out, replace with a 120-V

(60 W lamp) except in the case of 32 volt D.C. instrument

where a 32 volt - 25 watt lamp is required.

(q) Defective Magazine Relay Magnet No. 1537A, Fig. 2, broken

wire or bad connections on magnet posts.

( 5) For other corrective measures, refer to "Coin Switch

Assembly", page 9.

TURNTABLE FAILS TO RISE TO PLAYING POSITION

(I) Insufficient or faulty lubrication on the turntable spindle

bearings. Use SAE-10 oil. DO NOT USE a light sewing

machine oil as it does not have the body required at this

particular point.

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SERVICE MANUAL FOR 1939 MODELS

(2) Foreign obstacles such as dust or grit entering turntable

bearings.

(3) To remove dirt and foreign matter from turntable spindle No.

1011, Fig. 3: With turntable in uppermost position and the

motor cut off by means of turning off main switch in

Junction Terminal Box, flood generously with oil, moving

the turntable up and down with the fingers, and wipe off

with a clean cloth. Repeat this operation until the shaft

and bearings are clean. Re-oil lightly with No. SAE 10 oil

before leaving instrument.

(4) If turntable lift springs No. 1009,. Fig. 3 are too weak,

replace with new springs from the factory.

(5) It is possible that turntable gears may be meshed too

tightly. There should be a slight play between the teeth

of the turntable worm gear No. 1528-A and steel worm No.

1022, Fig. 1. Transmission casting No. 1040, Fig. 1 containing

the steel worm assembly can be moved away from the

turntable worm gear No. 1528-A to allow about . 00511 play

between the teeth of the gears.

TOO FEW PLAYS FOR THE AMOUNT OF COINS INSERTED

(I) Coin Switches may not be making contact. Refer to "Coin

Switch Assembly", page9. Refer also to "Magazine Relay

Does Not Respond to Coin", page 10.

(2) Magazine Ratchet Wheel No. 1525-A, Fig. 2 should be rotated

one notch for each stroke of the Magazine Ratchet Pawl No.

1532A when the Pawl is released by the Ratchet Pawl Release

Block No. 1153.

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SERVICE MANUAL FOR 1939 MODELS

If Ratchet Wheel should rotate two teeth for each stroke of

the Pawl, this difficulty may be overcome by cutting about

one eighth of an inch off the Magazine Ratchet Return Spring

No. 1143, Fig. 2. This will strengthen the spring which

will resist the ease of rotation of Ratchet Wheel slightly.

TOO MANY PLAYS FOR THE AMOUNT OF COINS INSERTED

(I) It may be that one of the Coin Switches is making more than

one contact, as the coin passes the Switch Lever. Refer to

"Coin Switch Assembly Unit" page 9.

( 2) Play Magazine Switch may not be cutting off. Check for

binds of any sort in switch lever, escapement lever, ratchet

wheel, etc. The tooth of Escapement Lever No. 1512A, Fig.

2, should catch the tooth of Magazine Ratchet Wheel No.

1525A as the Magazine Ratchet Pawl No. l532A is released

from the corner of Pawl Release Block No. 1153. This should

rotate the Ratchet Wheel one tooth for each cycle of the Cam

Shaft.

The action of the Magazine Ratchet Pawl No. 1532A is

caused by the rotation of the Cam Shaft, upon which it is

mounted.

(3) The Escapement Lever should be free from binds and have

about 1 /64 inch clearance between teeth of Lever 1512A and

the Ratchet Wheel No. 1525A as the Escapement Lever is moved

to and from the Magazine Relay No. 1537A. Should the tooth

of the Escapement lever not hold the Ratchet Wheel after

Ratchet Wheel has been rotated, same could be caused by a

weak Escapement Lever Spring No. 1150. Spring may be

12

SERVICE MANUAL FOR 1939 MODELS

strengthened by cutting off two or three coils.

COIN SWITCH ASSEMBLY

(I) As shown in Fig. 21 when a 25¢ coin enters the runway, it

successively moves the levers of the coin switches Nos. 1,

2, 3, 4 and 5 downward, making a single contact for each

lever moved. Each contact made should store a play in the

Play Magazine.

(2) Fig. 20 is a front view of the Coin Switch Assembly showing

the 5¢ and 10¢ coin runway. When a 5¢ coin enters, it

travels down the right hand runway, moving the lever on #4

coin switch downward, making a single contact. This should

store one play in the Play Magazine.

(3) When a 10¢ coin enters, it travels down the left hand runway,

moving the levers of #1 and #5 coin switches downward,

making two contacts. This should store two plays in the

Play Magazine.

(..) If coin switches fail to make proper contact, it is usually

because they have accumulated dirt or a film on the contact

surfaces, which may be cleaned by using a dry cleaner, such

as, carbon-tetrachloride. The best way to apply the cleaner

is to dip a small brush in the cleaner and wipe the

contact surfaces several times with the brush being careful

not to bend the blades of the switches too far, as this may

bend them out of adjustment.

NEEDLE DOES NOT ENTER RECORD GROOVE PROPERLY

( I) As the turntable comes up with a record, the needle should

contact the record about 3/32" from its edge. This should

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SERVICE MANUAL FOR 1939 MODELS

be for an average record which will be found to be approximately

9-7/811 in diameter. The adjustable support hook

No. 1846, Fig. 3 that holds the tone arm in position, ras

the turntable is being raised, may be adjusted so that the

needle will rest in its proper position on the record.

(2) If the needle stays in one position on the record and does

not enter the playing groove, the cause may be a bind in

the tone arm support rod No. 1121, Fig. 3, instrument being

too far out of level. If there is any sort of a bind in

the tone arm support rod No. 1121, same should be traced

down and remedied, as this will cause an improper reproduction

of the music as well as excessive record wear.

(3) If the instrument is too far out of level, same should be

leveled up within reason. A tone arm booster spring No.

1124 is shown in Fig. 3. This may be adjusted if necessary

to assist the movement of the needle toward the playing

grooves of the record.

(..) If tone arm booster spring No. 1J24 is adjusted with too

much tension, same may cause tone arm to skid across record,

when the turntable rises to playing position.

CHANGING MECHANISM MOT SET IN OPERATION AT END OF RECORD PLAY

{I) If stop groove in record is worn out or damaged, destroy

such a record and replace with a new one.

(2) If there is a bind in the tone arm support rod #1121, Fig.

3, it may seriously affect operation of the needle in the

cutoff groove, causing it to skip over and not follow the

groove. The bind should be remedied before attempting

any adjustments.

I..

SERVICE MANUAL FOR 1939 MODELS

(3) Changing Mechanism should be set in operation when the

needle enters the stop groove and has traveled to within a

distance of 1-7/811 from the center of the turntable spindle.

Should adjustments be necessary, refer to Fig. 10 and make

adjustments with the adjusting screw No. 1085 until the

proper setting has been made. Occasionally a record may be

found where the music has been recorded past the limits set

for the cutoff mechanism. It is inadvisable to reset the

mechanism to trip off for such a record.

(..) Transmission worm shaft No. 1044, Fig. 1, may be binding.

Sarne should slide back and forth freely. Steel worm

No. 1071 and large worm gear No. 3054, Fig. 1, may mesh too

tightly, causing shaft to bind slightly, or the flat spring

No. 1075 may be too weak. Spring may be strengthened by

removing and reforming the bend, taking care not to make

the bend too sharp or the spring may break.

(5) If trip lever in rear of cabinet is binding in hole through

rear panel, it may cause pressure against the clutch retaining

yoke No. 1508A, Fig. 10, preventing yoke from

engaging clutch retaining lever No. 1052. The trip lever

should work freely with rear panel installed.

TURNTABLE DOES NOT ROTATE WHEN IN PLAYING POSITION

( I) Turntable clutch No. 1014, Fig. 1, in the lower end of turntable

spindle should have a slight slippage to absorb the jar

as it engages with the clutch pin situated underneath the

turntable gear No. 1528A. If this clutch is too loose it will

not drive the turntable. In this event, the clutch spring

I 5

SERVICE MANUAL FOR 1939 MODELS

No. 1815 should be replaced.

(2) Turntable clutch No. 1014, Fig. 1 should come in engagement

with the pin underneath the turntable gear No. 1528A, Fig. 3.

With turntable in raised position, the turntable elevating

cam No.1006 should be clear of cam roller No.1016, Fig. 3 , so

that the turntable clutch will engage the clutch pin in turntable

gear. If turntable elevating cam does not stop in correct

playing position same can be slightly adjusted by means

of the adjusting screw on clutch release pawl No. 1077 mounted

on the turntable elevating cam 1006, shown in Fig. 1.

RECORD COMING UP TO PLAYING POSITION AND RETURNING WITHOUT PLAYING

( I) This may be caused by the clutch retaining lever No. 1052,

Fig. 10 slipping off the edge of clutch retaining yoke

No. 1508A at the points where they meet. Strengthening the

yoke spring No. 1057 , Fig. 10 by removing four or five coils

from the same should help overcome this condition.

(2) Make certain that the ratchet pawl No. 1056, Fig. 10, (which

becomes operative when the older type Victor records are

used ) clears the saw teeth No. 1058, when the yoke drops

down and when the tone arm is directly over the notch of the

tone arm post bracket No. 1846, Fig. 3.

TONE ARM WEIGHT ADJUSTMENTS

The weight of the tone arm at the needle with the needle just

barely clearing the record should be about 3 .5 ounces. A small

tone arm weight scale will be furnished each dealer o.r service man

on request which facilitates the weighing of the pickup and tone

arm.

16

SERVICE MANUAL FOR 1939 MODELS

As shown in Fig. 19, the indicator pointer of the scale

should be directly opposite the needle screw just as the needle

is leaving the grooves of the record. If the tone arm is too

heavy or too light, adjustment can be made by bending the flat

spring underneath the tone arm upward or downward respectively.

If this weighing test is made while instrument is playing,

it is easy to determine just when needle starts lifting out of

the grooves. Note: It is best to make a weight test near the

start of a record.

CONTINUES TO REPEAT SAME SELECTION

(I) Selector mechanism should rotate freely with selector levers

in non -selecting position. Same should be checked carefully

for any binds. A bind in any part of the selector mechanism

would cause the same to operate improperly.

(2) With selector levers in upward positions, the helix pins

No. 1254, Fig. 18 should clear the stop tooth on the

selector levers. If a selector lever tooth engaged one of

the front helix pins No. 1254, the helix could not rotate

and would, therefore, repeat the same selection as often as

this position of selector would be maintained. To eliminate

this, the front helix No. 6062A, Fig. 18 should be lowered

slightly until helix pins clear the stop teeth on the levers

above. The stop pin, Fig. 18, that holds front helix up in

position can be moved down slightly until helix pins clear

the levers, when the levers are in their uppermost, or nonselecting

position. This should enable front helix pins to

clear the teeth in the selector levers.

17

SERVICE MANUAL FOR 1939 MODELS

( 3) If no selection is made the rear helix No. 1583A Fig. 3 must

rotate 21/20 of a revolution for each complete cycle of the

cam shaft. This will enable the selector to advance one

number, and bring out a new record, each time the instrument

is played without selecting.

By marking the sprocket No. 1221, Fig. 11, with a

pencil at the last position of the roller No. 1822 and

watching the rotation of sprocket with mechanism in operation,

the amount of rotation may be determined. Proper

adjustment of same can be made by means of adjustment

screw in segment gear No. 1807, Fig. 3, that controls the

amount of travel of the segment gear. The amount of travel

of this segment gear determines the amount of rotation of

the selector helix - when no selection is made.

SELECTOR PULLING OUT TWO OR MORE TRAYS AT ONE TIME

(I) When a selection is made one tray only should be pulled out

at a time. The trays are withdrawn by means of the selector

slide pawls No. 1183, Fig. 8 (of which there are twenty).

One of these becomes engaged to a lug on a tray No. 1110,

when one of the rollers No. 1223 of helix No. 1583A push

against the selector slide pawl spring No. 1184, thereby

moving the pawl No. 1183 inward, as shown in Fig. 8.

The selector pawls No. 1183, Fig. 8, are urged inward

at all times by the action of the selector pawl springs

No. 1184. But when the selector slide No. 1180 is in position

with the selector pawls opposite the lugs as shown in

Figure 6, then the action of the selector pawl lift springs

18

SERVICE MANUAL FOR 1939 MODELS

stud No. 1222, Fig.3, slightly upward or downward until the

proper alignment of the roller with the selector pawl spring

is attained.

(2) The selector pawl lift spring No. 1113 shown in Fig. 8,

should be strong enough to overcome the pressure of the selector

pawl spring No. 1184, Fig. 8, expecting when the

roller No. 1223 of the selector helix gives the added pressure

to selector pawl spring No. 1184. If the selector pawl

lift spring No. 1113 is not strong enough, it may be

strengthened by bending outward slightly, or the same result

may be obtained by weakening the opposing or selector pawl

spring No. 1184 slightly.

(3) Helix No. 1583A should stop after being rotated in such a

position that the helix lock roller No. 1125, Fig. 11, rests

in the recess of the sprocket No. 1221.

If the helix is stopping with lock roller No. 1822,

resting on tooth of sprocket No. 1221, it may be that the

segment gear No. 1807, Fig. 3 does not travel the proper

distance. This may be corrected by carefully following

these instructions:

See that all selector keys are in cancelled position.

In other words, that no selection is made. Then place

roller No. 1822, Fig. 11, in one of the recesses of the

sprocket No. 1221, put a pencil mark on sprocket at point

where roller is in contact - then start mechanism in motion,

and watch the rotation of the sprocket. It must turn 21/20

of a revolution, or one recess of the sprocket past the

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SERVICE MANUAL FOR 1939 MODELS

No. 1113 should be strong enough to overcome the pressure

of the selector pawl springs No. 1184 and prevent the

selector pawls from becoming engaged to the lugs on the

trays Fig. 6. That is, with the exception of that particular

pawl which is pressed in through the action of the

helix roller against the selector pawl spring No. 1184,

Fig. 8.

The following added points should be carefully checked

and adjusted if necessary:

The selector helix rollers No. 1223, Fig. 3, should be

in line with the centers of the selector pawl springs

No. 1184. If out of line so that roller also engages the

spring above or below the one selected it may depress two

pawl springs causing two trays to be withdrawn. The selector

slide rail No. 1181, Fig. 3, may have moved downward

slightly, or the helix No. l583A, Fig. 3 may have moved up

or down. Before attempting to re-align the selector slide

rail, be sure that this is necessary. Make certain that

the selector slide pawls No. 1183, Fig. 3 are kept in

alignment with the grooves in which the lugs of the trays

move.

In re-aligning the helix, be sure that the proper mesh

of the miter gears No. 1210, Fig. 7, is maintained, and

that the timing of selector is not disturbed, or if so,

properly retimed. If one or two rollers are out of line

with the selector pawl springs, the adjustment of same can

be greatly simplified by bending the helix roller mounting

I 9

SERVICE MANUAL FOR 1939 MODELS

pencil mark, and lock roller No. 1822 must stop directly in

this recession. The rotation of selector is controlled by

the segment gear No. 1807, Fig. 3. If amount of rotation of

the selector is not correct, adjustment can be made by advancing

or retarding small adjusting screw (in segment gear

No. 1807). This segment gear No. 1807 rotates the helix

through the small driving gear No. 1809, Fig. 7, that is

mounted on the selector shaft No. 1816 and upon which the

miter gear No. 1210 is also mounted.

RECORD TRAYS CANNOT BE RETURNED TO THEIR NORMAL POSITION AFTER

CHANGING RECORDS

Motor switch may open too late. To cut motor off earlier,

the setscrew of Magazine Kicker Block No. 1513A, Fig 2 should be

loosened slightly and No. 1513A should be tapped lightly with a

light hammer in a clockwise direction. Block should not be moved

more than about 1/16 of an inch at a time. The setscrew holding

same should be well tightened before starting the mechanism.

SOUND EQUIPMENT

Pickup: The pickup is of special design and is built to match

the other parts which make up the sound equipment. It is very

rugged in design both mechanically and electrically and will

stand wide changes in both temperature and humidity. The pickup

is sealed and if it should at any time prove defective, return

same to factory with seal unbroken. A very nominal charge is

made for the repair or replacement of a pickup with its seal

intact.

2 1

SERVICE MANUAL FOR 1939 MODELS

Volume Control: The volume control is located in the Junction

Terminal Box and is so designed that the volume may be adjusted

from off to full level with an even rate of increase. Should

the control cause the volume to jump up at a rapid rate when

turned and then go down again when turned slightly farther, the

control is defective and should be replaced.

Amplifier: The Amplifiers used in the models Mayfair, Plaza

and Casino are the Models 830-lZ, 725-lZ and the 625-lZ respectively.

They are all designed to operate at any volume set by

the control from very soft to full output without distortion or

bad tone quality. All the amplifiers are equipped with Dual

Tone compensators one of which is used for modifying the high

frequency notes and the other for modifying the lower frequencies

or bass notes. Care should be used in adjusting these because

by subduing either the high notes or the low notes to too

great an extent, the tone quality and faithful reproduction of

music will be greatly impaired.

Tubes: When installing or replacing tubes, special attention

must be paid to the designated number on each tube. Each tube

must be inserted in its proper tube socket having a corresponding

number, Failure to do so may result in a burned out tube

filament or a blown amplifier fuse. Make certain that each tube

is firmly pushed into its socket to make proper contact.

Speaker: The speaker used in each model Symphonola is designed

and matched to operate with the other parts which make up the

sound equipment for that particular instrument and is built to

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SERVICE MANUAL FOR 1939 MODELS

withstand the full volume of the amplifier without injury. Care

should be taken not to allow dirt to enter the speaker as this

may cause a rattle or bad reproduction of music.

SOUND EQUIPMENT APPARENTLY "DEAD"

Note whether the fuse in the amplifier is blown. If it is

blown, replace with 3 ampere fuse, but before replacing test all

tubes with a tube analyzer and tap the tubes with the fingers

while they are being tested so that any shorts will be indicated.

Make certain that there is a separation between the contact

points of the pickup shorting switch No. 6005, Fig. 3, when instrument

is in playing position as shown in Fig. 3. Check to

see if needle is making contact with record. With instrument on,

turntable rotating, volume control on full, and pickup shorting

switch in open position, remove the tube nearest socket marked

(Mic.). A loud click should be heard. If no click is heard

trouble could then be in amplifier which should be checked by a

competent sound or radio repair man. If a loud click is heard

when tube nearest socket marked (Mic. ) is removed, then the

trouble may be in pickup shorting switch, pickup wires, or

pickup itself.

FAULTY TONE QUALITY

(1) Remove needle and check point under a good light. Sometimes

a needle that has worn badly. will still play some records,

but will fail to enter properly the more narrow grooves on

others. A needle in this condition will cause poor quality

reproduction and should, of course, be replaced.

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SERVICE MANUAL FOR 1939 MODELS

(2) Make certain that the records are still in fairly good condition.

This is very important, for the reproduction of

music will still be poor if the record is badly worn, or

defective, even though the entire sound equipment is _in perfect

working order. A shorted or defective tube is often a

cause of faulty tone quality.

(3) A loose connection at the pickup connection or the Junction

Terminal Box, or the terminal block on the chassis can affect

the tone quality.

(..) Check volume control by rotating same when a record is being

played. If sudden changes in volume are noticed, the cause

may be dirt between the contact arm and resistor in the control,

or a defective resistor. It is often possible to

remove dirt or scale by rotating the control back and forth

rapidly. If, after trying this, the control still causes

sudden changes in volume, when it is rotated slowly, replacing

of control is advisable.

INSTRUCTION S FOR INSTALLATION OF EXTRA SPEAKER AND SPEAKER

VOLUME UNIT

To install the extra speaker, the seven-prong dummy plug in

the left hand side of the amplifier (looking from rear of

cabinet) is removed, and the plug attached to the cord of the

special speaker control unit is inserted in its place. The plug

attached to the cord of the extra speaker is then inserted in

either one of the two red sockets of the speaker control device.

Two extra speakers may be operated at the same time from the unit

if desired.

SERVICE MANUAL FOR 1939 MODELS

There are five positions on the switch of the control: The

third, or center tap affords the same volume level on both the

instrument speakers and the extra speaker. By turning the switch

from the center tap in one direction, the volume increases in the

extra speaker and decreases in the instrument speakers. By turning

the switch in the opposite direction, the volume is reduced

in the extra speaker and increased in the instrument speakers.

The regular Instrument Volume Control is used to govern the actual volume level desired.

The Speaker Control Unit is mounted on the inside of the

extra speaker cabinet for packing purposes only and should be removed

and mounted inside the extra speaker cabinet on the lefthand

side about 611 from the bottom, flush with the back edge and

with the extra speaker sockets facing upward. A 1-1/411 hole

should then be drilled in the rear door and in the correct position

to allow the speaker control key to be accessible for

adjustment.

JUNCTION TERMINAL BOX

The purpose of the junction terminal box is to route the

current entering by way of the line cord to its proper channels.

There is very little chance for any trouble occurring in the

junction terminal box, with the possible exception of the main 1

switch, light switch, and volume control. It is not advisable

to try to repair any of these in case of a defect as they may be

replaced at a nominal charge.

If, a t any time, it is necessary to remove any of the wires

from the terminals on the junction terminal box, make certain

that they are replaced exactly as they were originally.

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SERVICE MANUAL FOR 1939 MODELS

FUSES: There are two fuse receptacles in the junction terminal

box. The upper one contains the light fuse and the lower one

the motor fuse.

To remove a fuse from either fuse receptacle, it is necessary

to unscrew the center section of the receptacle with a

screw driver and pull the fuse out of this removed section.

NOTE: It is very important to replace a blown fuse with one of

the correct value. At the bottom of this page is a table listing

the ampere capacity of fuses used in each model Symphonola.

LIGHT FUSE BLOWS:

(I ) Look for source of trouble before replacing fuse.

(2) A broken or defective socket may cause a fuse to blow.

(3) If lamps of greater wattage than those supplied with the

instrument are used they may cause the light fuse to blow

on the models Mayfair, Plaza and Casino.

Light Motor

Model Fuse Fuse

Mayfair 115V-60 Cycle 1 3

II 115V-DC 1 3

II 32V DC 3

II 115V-25 Cycle 1 3

Plaza 115V-60 Cycle 1 3

II 115V-DC 1 3

II 32V-DC 3

II ll5V-25 Cycle 1 3

Casino 115V-60 Cycle 1 3

" 115V-DC 1 3

" 32V-DC 3

" 115V-25 Cycle 1 3

Classic 115V-60 Cycle 3

II 115V-DC 3

II 32V-DC 10 3

II 115V-25 Cycle 3

Vogue 115V-60 Cycle 3

II 115V-DC 3

" 32V-DC 10 3

II 115V-25 Cycle 3

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SERVICE MANUAL FOR 1939 MODELS

RECORD PLAYING INDICATOR DIAL

(I) The "record playing" Indicator Dial is located just back of

the cabinet escutcheon and is illuminated by the same lamps

that illuminate the program holder. It is timed with the

selector. Should the numbers appear off center or indicate

the wrong number being played dial may be retied by selecting

record No. 20 and stopping mechanism when record is in

playing position. Remove the program holder, reset the

dial to correct position, tighten all screws and start

motor.

(2) Indicator Dial should rotate freely. If there is a bind in

same, inspect carefully to see if it is rubbing on front of

cabinet. A bind in Indicator Dial will affect the operation

of the selector.